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Examen
PSYC 220 Exam 2 Timothy Dugas SELU Questions and Answers | 2026 Update | 100% Correct.
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---9octubre 20252025/2026A+
- Why to use Correlational Research - CORRECT ANSWER-1. Provides a good source 
to identify potential causal relationships. 
2. Variables are not able to be manipulated 
3. Relate naturally occurring variables. 
Correlational Research - CORRECT ANSWER-Goal: Identify relationships, observe if 
variables covary 
correlation coefficient: r 
-1.00 ≤ r ≤ 1.00 
strength of relationship: magnitude 
direction of relationship: + / - 
Positive Correlation - CORRECT ANSWER-factors vary in same direction ...
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ACADEMICMATERIALS
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Examen
PSYC 220 EXAM 1 REVIEW QUESTIONS & ANSWERS VERIFIED 100% CORRECT!!
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---17octubre 20252025/2026A+
- epigenetic influences on gene expression - CORRECT ANSWER-changes in gene 
expression based on experience, interaction between environment and genes 
with high grooming mothers, pups are less fearful as adults when placed in stressful 
situation 
-nurturing behavior triggers the release of serotonin in the pups which reduces the 
expression of genes mediating stress hormones and animals respond more calmly to 
stress 
examples of substances that can negatively impact prenatal development - CORRE...
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ACADEMICMATERIALS